Step 8.  Install the Seven Segment Displays

Install the seven segment displays on the same side of the PCB as the tact switches.  That is, the display side of the PCB.  Be careful not to solder any of the seven segment displays upside down or it will be a pain to remove it.  Double check that the decimal point on each display is in the correct position before soldering.  Solder the leads from the component side of the PCB.  If any of the IC leads interfere with the displays fully seating, gently bend them out of the way with sharp-nosed pliers or tweezers.